Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths
Tunnel blasting is prone to inducing disasters such as rock collapse, and parameters such as pulse width and amplitude of the blasting stress wave directly affect the degree of tensile damage of the tunnel surrounding rock. In order to investigate and quantitatively analyse the effects of pulse widt...
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Emergency Management Press
2025-08-01
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| Series: | 矿业科学学报 |
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| Online Access: | http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2025038 |
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| author | XIE Beijing LIN Shurong HUANG Chunyi LI Xiaoxu SHI Jiayu LUAN Zheng |
| author_facet | XIE Beijing LIN Shurong HUANG Chunyi LI Xiaoxu SHI Jiayu LUAN Zheng |
| author_sort | XIE Beijing |
| collection | DOAJ |
| description | Tunnel blasting is prone to inducing disasters such as rock collapse, and parameters such as pulse width and amplitude of the blasting stress wave directly affect the degree of tensile damage of the tunnel surrounding rock. In order to investigate and quantitatively analyse the effects of pulse width and amplitude on the dynamic mechanical properties of water-saturated red sandstone, a dynamic Brazilian splitting test was carried out on dry/water-saturated red sandstone by using a split Hopkinson pressure bar system, a high-speed video camera, and digital imaging technology. The results show that the water-saturated condition can weaken the strength of red sandstone, with tensile strength weakening rates of 91.16 %, 94.00 %, 94.86 % and 95.09 % for bullet impacts of 200 mm, 300 mm, 400 mm and 500 mm length, respectively; the damage mode of red sandstone is dominated by the expansion of tensile cracks, and the increase of the pulse width of the incident stress wave can promote the initiation and expansion of tensile cracks; moisture inhibits the absorption of energy in red sandstone, and the absorbed energy per unit volume increases with the increase of the pulse width of the stress wave; the percentage of non-tensile energy consumption of water-saturated red sandstone is higher than 80 % under the conditions of impact speed greater than 8 m/s under each pulse width, and the energy consumption rate of red sandstone decreases to less than 5 % when the impact speed is greater than 10 m/s, and the free water in cracks can produce a force that can inhibit the expansion of cracks, and the absorbed energy is used for shear damage. |
| format | Article |
| id | doaj-art-b0343a7022b34c218ebe3c481e8bd358 |
| institution | Kabale University |
| issn | 2096-2193 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj-art-b0343a7022b34c218ebe3c481e8bd3582025-08-20T03:34:08ZengEmergency Management Press矿业科学学报2096-21932025-08-0110459560610.19606/j.cnki.jmst.2025038kykxxb-10-4-595Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widthsXIE Beijing0LIN Shurong1HUANG Chunyi2LI Xiaoxu3SHI Jiayu4LUAN Zheng5School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaNorthwest Engineering Corporation Limited, Xi'an Shaanxi 710065, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaTunnel blasting is prone to inducing disasters such as rock collapse, and parameters such as pulse width and amplitude of the blasting stress wave directly affect the degree of tensile damage of the tunnel surrounding rock. In order to investigate and quantitatively analyse the effects of pulse width and amplitude on the dynamic mechanical properties of water-saturated red sandstone, a dynamic Brazilian splitting test was carried out on dry/water-saturated red sandstone by using a split Hopkinson pressure bar system, a high-speed video camera, and digital imaging technology. The results show that the water-saturated condition can weaken the strength of red sandstone, with tensile strength weakening rates of 91.16 %, 94.00 %, 94.86 % and 95.09 % for bullet impacts of 200 mm, 300 mm, 400 mm and 500 mm length, respectively; the damage mode of red sandstone is dominated by the expansion of tensile cracks, and the increase of the pulse width of the incident stress wave can promote the initiation and expansion of tensile cracks; moisture inhibits the absorption of energy in red sandstone, and the absorbed energy per unit volume increases with the increase of the pulse width of the stress wave; the percentage of non-tensile energy consumption of water-saturated red sandstone is higher than 80 % under the conditions of impact speed greater than 8 m/s under each pulse width, and the energy consumption rate of red sandstone decreases to less than 5 % when the impact speed is greater than 10 m/s, and the free water in cracks can produce a force that can inhibit the expansion of cracks, and the absorbed energy is used for shear damage.http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2025038brazilian testmechanical propertiesenergy dissipationsplit hopkinson pressure bardic |
| spellingShingle | XIE Beijing LIN Shurong HUANG Chunyi LI Xiaoxu SHI Jiayu LUAN Zheng Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths 矿业科学学报 brazilian test mechanical properties energy dissipation split hopkinson pressure bar dic |
| title | Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths |
| title_full | Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths |
| title_fullStr | Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths |
| title_full_unstemmed | Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths |
| title_short | Study on the dynamic splitting characteristics of water-saturated red sandstone under stress waves with different pulse widths |
| title_sort | study on the dynamic splitting characteristics of water saturated red sandstone under stress waves with different pulse widths |
| topic | brazilian test mechanical properties energy dissipation split hopkinson pressure bar dic |
| url | http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2025038 |
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